Question on Tiagra Bottom Bracket

whysomanyhills

Hi,

I'm just wondering if anyone knows if the 4600 Tiagra bottom bracket http://www.chainreactioncycles.com/ie/en/shimano-4600-tiagra-bottom-bracket/rp-prod67221 is a valid replacement for the 4500 Tiagra Bottom Bracket http://www.ribblecycles.co.uk/sp/road-track-bike/bottom-brackets-bottom-brackets-shimano-4500-bb-cups-34-4500-double-triple/shimbtbr710.

The 4500 doesn't seem to be stocked by the main retailers anymore. I've got a 09 Lapierre RCR 500 an just need to replace the bottom bracket.

Cheers

Eamonnator

Yes, they are interchangeable.
Just be careful, that you get the correct diameter for your bike.
CRC have two diameters for sale.
Most road bikes are 68mm

whysomanyhills

Thanks Eamonnator - There's the English Thread (70 mm) and Italian Thread (68 MM) on CRC

The old bracket had the markings "BC1.37 x 24 ROAD HL" on it. Inner markings are SM-FC4500.

I can't see anything in relation to the size though either on the Frame or the Bracket

Eamonnator

What bike is it for?

whysomanyhills

09 Lapierre RCR 500

Eamonnator

What you need is English thread, 68mm.
CRC have the one, toy want.

I think you may have mistaken the diameter on CRC's site
The English thread is 68mm.
In my opinion, CRC's new site is very confusing.

The important thing is ENGLISH THREAD.

whysomanyhills

Cheers Eamonnator - much appreciated